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SPI 630-4000 Setup 1-2-3 Blocks: 5 Tapped (3/8-16) Holes & 18 Untapped (3/8') Holes

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$36.71

$ 16 .99 $16.99

In Stock
  • This SPI steel 1-2-3 Block set includes a matched pair of 1-inch x 2-inch x 3-inch blocks, socket head cap screws, and a hex key
  • Squareness of all sides is within 0.0001 per inch
  • Constructed of hardened steel with 45-50 HRC Hardness
  • There are a total of 23 holes: 5 tapped (3/8-16) holes and 18 un-tapped (3/8") holes for easy clamping


This SPI steel 1-2-3 Block set includes a matched pair of 1-inch x 2-inch x 3-inch blocks, socket head cap screws, and a hex key. Each block has a 50 HRC hardness with 0.0001-inch squareness. There are a total of 23 holes: 5 tapped (3/8-16) holes and 18 un-tapped holes for easy clamping.


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